Home / 258,849.36-388,273.68-81,371.88

Finding the Fourth Proportional to 258,849.36, 388,273.68 and 81,371.88

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Solution

The fourth proportional to 258,849.36, 388,273.68 and 81,371.88 is: 122,057.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,849.36 : 388,273.68 = 81,371.88 : x
  2. Step 2: Convert to fraction form
    258,849.36/388,273.68 = 81,371.88/x
  3. Step 3: Cross multiply
    258,849.36x = 388,273.68 × 81,371.88
  4. Step 4: Simplify right side
    258,849.36x = 31,594,559,296.12
  5. Step 5: Solve for x
    x = 31,594,559,296.12/258,849.36
  6. Step 6: Final answer
    x = 122,057.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.